Insider information, or abbreviated "insider" (from the English word inside - "inside") is the data received from an employee of an organization or firm, and intended for "internal use." This information, as a rule, is not subject to disclosure, as it can cause damage to this firm or give an advantage to its competitors. Insider information comes, as a rule, from insiders - people working in the company and familiar with its secrets. A person who owns an insider, in case of any problems in the company, can learn about them in advance and quickly "merge" its shares. And in football, the inside is the central midfielder.
Inside is in the list: Slang